<template>
  <div class = "home-container">
    <el-container class = "home-container">
    <!-- 头部区域-->
      <el-header>
        <div>
          <img src="../assets/logo2.png" alt="">
          <span>实验室设备管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
      </el-header>
      <!-- 页面主体区-->
      <el-container>
        <!--  侧边栏-->
        <el-aside :width="isCollapsed ? '64px' : '200px'">
          <div class="toggle-butto" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单栏-->
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409eff"
            :unique-opened="true"
            :collapse="isCollapsed"
            :collapse-transition="false"
            :router="true"
            :default-active = "activePath">
            <!-- 一级菜单-->
            <el-submenu :index="item.id + '' "  v-for="item in menuList" :key="item.id">
              <!-- 一级菜单模板区域-->
              <template slot="title">
                <!--图标 -->
                <i :class="iconObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{item.authName}}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/'+subItem.path"
                            v-for="subItem in item.children"
                            :key="subItem.id"
                            @click="saveNavSrate('/' + subItem.path)">
                <template slot="title">
                  <!--图标 -->
                  <i class="el-icon-menu"></i>
                  <!-- 文本 -->
                  <span>{{subItem.authName}}</span>
                </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!--内容主题-->
        <el-main>
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
export default {
  name: 'Home',
  data () {
    return {
      menuList: [],
      iconObj: {
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        103: 'iconfont icon-tijikongjian',
        125: 'iconfont icon-user',
        145: 'iconfont icon-baobiao'
      },
      isCollapsed: false,
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
      this.$message.info('退出成功')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus/menusList')
      if (res.returnCode !== 200) return this.$message.error(res.returnMsg)
      this.menuList = res.data
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapsed = !this.isCollapsed
    },
    // 保存链接的激活状态
    saveNavSrate (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
  .home-container {
    height: 100%
  }
 .el-header {
   background-color: #373b41;
   display: flex;
   justify-content: space-between;
   padding-left: 0;
   align-items: center;
   color: #ffffff;
   font-size: 20px;
   > div{
     display: flex;
     align-items: center;
     span{
       margin-left: 15px;
     }
   }
 }
  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: 0px;
    }
  }
  .el-main {
    background-color: #dddddd;
  }
  .iconfont{
    margin-right: 10px;
  }
  .toggle-butto{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #ffffff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
